Maker



(No Model.) V

E. T. SGHOONMAKER.

I OAR BRAKE. NO. 413,330. Patented 0013. 22, 1889.

iii- 1.

UNITED STATES PATENT OFFIC EDWARD T. SOHOONMAKER, OF NEW YORK, N. Y.

CAR-BRAKE.

SPECIFICATION forming part of Letters Patent No. 413,330, dated October22, 1889.

Application filed August 16, 1889. Serial No. 320,977. (No model.)

To all whom it may concern:

Be it known that I, EDWARD T. SCI-100N- MAKER, of New York,in the countyand State of New York, have invented a certain new and usefulImprovement in Oar-Brakes, of which the following is a specification.

My improvement relates more particularly to means for operating acar-brake, and is especially adapted for use with car-brakes employedupon street-cars.

I will describe in detail a car-brake embodyin g my improvement, andthen point out the novel features in claims.

In the accompanying drawings, Figure 1 is a side elevation, partly insection, of means for operating a car-brake, embodying my improvement.Fig. 2 is a plan or top view of the same. Fig. 3 is a detail View inplan showing certain of the parts in a different position from that inwhich they are shown in Figs. 1 and 2.

Similar letters of reference designate corresponding parts in all thefigures.

A designates a brake-shaft, upon which is secured near its lower end aratchet-wheel a, with which a dog a is adapted to be engaged, as isusual. To-t'he lower portion of the shaft A is secured one end of achain B, which chain leads to the brake in the usual manner. The shaft Ais journaled in bearings C O, the former secured upon the platform orflooring of the car and the latter upon the upper side of the dash-board0 Upon the upper end of the shaft A is rigidly secured a ratchetwheel D.

E designates a crank by which the shaftA is to be turned to apply thebrake. of the crank is provided with an enlargement e, which enlargementhas extending vertically through it an aperture e here shown ascylindrical. A port-ion e of the enlargement e is extended to one sidethereof, as here shown, at approximate right angles to the length of themain portion of the crank E. The portion 6 is pivoted, as here shown, bymeans of .a screw a upon aprojection a, forming part of a sleeve or hub6 which is loosely mounted upon the shaft A. The crank E may be swungfreely upon the pivot 6 Extending from the inner wall of the aperture 6'is a tooth e9.

plishing this, consisting of a One end In Fig. 2 I have shown the toothe as engaging one of the teeth upon the ratchetwheel D. This isaccomplished by so swinging the crank E that the tooth 6 will become soengaged. hen thus engaged, the shaft A may, by turning the crank E, berapidly rotated to wind up the chain B, and thus apply the brakes. Whenit is desired to release the brake, the crank E is swung upon its pivot,so as to disengage the tooth e fromthe teeth upon the ratchet-wheel D.As soon as this has been done, the tension upon the chain B will causethe rotation of the shaft A in a reverse direction, and thus take offthe brake. It will be observed that all that is necessary to cause theengagement and disengagement of the tooth e from the ratchet-wheel D isto impart a slight longitudinal movement to the crank E.

In Fig. 3 I have shown the tooth e disengaged from the ratchet-wheel D.

It is quite desirable to prevent a too ex tended longitudinal movementof the crank E, in order that when the tooth c has been released and theratchet-wheel D is rotating in the reverse direction the latter will notcontact with the side walls of the aperture'e. I have shown a convenientstop for accomprojection f on the enlargement 6, extending into a notchf, formed in the sleeve or hub 6 is only of snfficient width to admit ofa movement of the crank E, which will remove the tooth e from the wheelD, as the projection f will contact with the side wall of the notch.This contact also prevents the wheel D from striking the side wall ofthe aperture e. In the example of my improvement shown, a cap F isarranged to extend over the top of the enlargement c, and thus inclosesthe ratchetwheel D.

It will be seen that by my improvement the brake may be readily releasedwithout any reverse motion of the crank. Of course, if, instead ofplacing the ratchet-wheel D upon the shaft A, the tooth 6 were placed onsaid shaft and the inner wall of the aperture 6 were provided withratchebteeth, the result would be the same, as in either event alongitudinal movement of the crank would cause the engagement of thecrank with the shaft.

This notch What I claimas my invention, and desire to secure by LettersPatent, is

1. The combination, with a brake, of-a shaft having near its upper end aprojection, a crank pivoted upon said projection so as to be capable oflongitudinal movement toward and from said shaft, said crank and shaft,the one being provided with a ratchet and the other with a tooth forengaging the ratchet, substantially as specified.

2. The combination, with the shaft A, having mounted upon it the sleeveor hub 8 of the crank E, pivoted upon said sleeve or hub so as to becapable of longitudinal movement toward and from the shaft, theratchet-Wheel D on said shaft, and the tooth 6 upon the EDWARD T.SOI-IOONMAKER.

Vitnesses:

' S. G. LAURENCE, WV. F. RANDALL.

